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      <a id="maca"></a>
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      <a id="IndexMaca" class="indexterm"></a>
      <div class="refnamediv">
        <h2>
          <span class="refentrytitle">maca</span>
        </h2>
        <p>maca — 
      Multiply and accumulate a-rate signals only.
    </p>
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      <div class="refsect1">
        <a id="idp122246960"></a>
        <h2>Description</h2>
        <p>
      Multiply and accumulate a-rate signals only.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp122313456"></a>
        <h2>Syntax</h2>
        <pre class="synopsis">ares <span class="command"><strong>maca</strong></span> asig1 , asig2 [, asig3] [, asig4] [, asig5] [...]</pre>
      </div>
      <div class="refsect1">
        <a id="idp122315600"></a>
        <h2>Performance</h2>
        <p>
      <span class="emphasis"><em>asig1, asig2, ...</em></span> -- a-rate input signals
    </p>
        <p>
      <span class="emphasis"><em>maca</em></span> multiplies and accumulates a-rate signals only. It is equivalent to:
      </p>
        <div class="literallayout">
          <p><br />
        ares = asig1*asig2 + asig3*asig4 + asig5*asig6 + ...<br />
      </p>
        </div>
        <p>
    </p>
      </div>
      <div class="refsect1">
        <a id="idp122319104"></a>
        <h2>Examples</h2>
        <p>
      Here is an example of the maca opcode. It uses the file <a class="ulink" href="examples/maca.csd" target="_top"><em class="citetitle">maca.csd</em></a>. It is written for *NIX systems, and will generate errors on Windows.
      </p>
        <div class="example">
          <a id="idp122321024"></a>
          <p class="title">
            <strong>Example 465. Example of the maca opcode.</strong>
          </p>
          <div class="example-contents">
            <p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
            <pre class="programlisting">
<span class="csdtag">&lt;CsoundSynthesizer&gt;</span>
<span class="csdtag">&lt;CsOptions&gt;</span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac     <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc    ;;;uncomment -iadc if real audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o mac.wav -W ;;; for file output any platform</span>
<span class="csdtag">&lt;/CsOptions&gt;</span>
<span class="csdtag">&lt;CsInstruments&gt;</span>

<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span>  <span class="op">=</span> 1

<span class="oblock">instr</span> 1	<span class="comment">;4 band equalizer</span>

klow <span class="op">=</span>	p4	<span class="comment">;low gain1</span>
aenv1   <span class="opc">oscil</span>   0.2, 1, 4
aenv1 <span class="op">=</span> aenv1 <span class="op">+</span> klow
klmid <span class="op">=</span>	p5	<span class="comment">;low gain2      </span>
aenv2   <span class="opc">oscil</span>   0.21, 1.1, 4
aenv2 <span class="op">=</span> aenv2 <span class="op">+</span> klmid
kmidh <span class="op">=</span> p6	<span class="comment">;high gain1</span>
aenv3   <span class="opc">oscil</span>   0.19, 1.2, 4
aenv3 <span class="op">=</span> aenv3 <span class="op">+</span> kmidh
khigh <span class="op">=</span>	p7	<span class="comment">;high gain2</span>
aenv4   <span class="opc">oscil</span>   0.18, 1.3, 4
aenv4 <span class="op">=</span> aenv4 <span class="op">+</span> khigh

ifn  <span class="op">=</span>  p8	<span class="comment">;table</span>

ilc1 <span class="opc">table</span> 0, ifn	<span class="comment">;low freqency range</span>
ilc2 <span class="opc">table</span> 1, ifn	<span class="comment">;low-mid</span>
ihc1 <span class="opc">table</span> 2, ifn	<span class="comment">;mid-high</span>
ihc2 <span class="opc">table</span> 3, ifn	<span class="comment">;high</span>

asig	<span class="opc">diskin2</span>	 "fox.wav", 1
alow1	<span class="opc">butterlp</span> asig, ilc1		<span class="comment">;lowpass 1</span>
almid	<span class="opc">butterlp</span> asig, ilc2	      	<span class="comment">;lowpass 2</span>
amidh 	<span class="opc">butterhp</span> asig, ihc1	       	<span class="comment">;highpass 1</span>
ahigh	<span class="opc">butterhp</span> asig, ihc2		<span class="comment">;highpass 2</span>
aout	<span class="opc">maca</span>	 aenv1, alow1, aenv2, almid, aenv3, amidh, aenv4, ahigh
        <span class="opc">outs</span>	 aout, aout

<span class="oblock">endin</span>
<span class="csdtag">&lt;/CsInstruments&gt;</span>
<span class="csdtag">&lt;CsScore&gt;</span>
<span class="stamnt">f</span>1 0  4 -2 150 300 600  5000
<span class="stamnt">f</span>2 0  4 -2 75  500 1000 10000
<span class="stamnt">f</span>3 0  4 -2 200 700 1500 3000
<span class="stamnt">f</span>4 0  4096 10 1

<span class="comment">;          low lowmid midhigh high table		</span>
<span class="stamnt">i</span> 1 0  2.8  2    1      1      1     1  
<span class="stamnt">i</span> 1 3  2.8  2    3      1      1     2 
<span class="stamnt">i</span> 1 6  2.8  2    1      2      3     3 
<span class="stamnt">e</span>
<span class="csdtag">&lt;/CsScore&gt;</span>
<span class="csdtag">&lt;/CsoundSynthesizer&gt;</span>
</pre>
          </div>
        </div>
        <p><br class="example-break" />
    </p>
      </div>
      <div class="refsect1">
        <a id="idp122325312"></a>
        <h2>See Also</h2>
        <p>
      <a class="link" href="mac.html" title="mac"><em class="citetitle">mac</em></a>
    </p>
      </div>
      <div class="refsect1">
        <a id="idp122327328"></a>
        <h2>Credits</h2>
        <p>
      </p>
        <table border="0" summary="Simple list" class="simplelist">
          <tr>
            <td>Author: John ffitch</td>
          </tr>
          <tr>
            <td>University of Bath, Codemist, Ltd.</td>
          </tr>
          <tr>
            <td>Bath, UK</td>
          </tr>
          <tr>
            <td>May 1999</td>
          </tr>
        </table>
        <p>
    </p>
        <p>New in Csound version 3.54</p>
      </div>
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